Go with Tom. Ive been through hell and back with my car, changing things here and there from something small like an o2 sensor, to now bigger injectors and more boost. Ive been working with him a year (lots of downtime because of winter storage and other personal reasons) but he was there for me when I had questions even about building my engine. Now hes going above and beyond to help me get a livewire so we can continue tuning. At this point I literally could care less about the money I paid for the tuning, its even less then his competition, because of all the help Ive gotten. Trust me get an xcal3 from Tom, you wont be disappointed.